diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 42f4b55e20e3..346c0023f64c 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11998,6 +11998,9 @@ static int intel_crtc_atomic_check(struct drm_crtc *crtc,
 			DRM_DEBUG_KMS("No valid intermediate pipe watermarks are possible\n");
 			return ret;
 		}
+	} else if (dev_priv->display.compute_intermediate_wm) {
+		if (HAS_PCH_SPLIT(dev_priv) && INTEL_GEN(dev_priv) < 9)
+			pipe_config->wm.ilk.intermediate = pipe_config->wm.ilk.optimal;
 	}
 
 	if (INTEL_INFO(dev)->gen >= 9) {
@@ -15961,6 +15964,9 @@ retry:
 
 		state->acquire_ctx = &ctx;
 
+		/* ignore any reset values/BIOS leftovers in the WM registers */
+		to_intel_atomic_state(state)->skip_intermediate_wm = true;
+
 		for_each_crtc_in_state(state, crtc, crtc_state, i) {
 			/*
 			 * Force recalculation even if we restore